If I negotiated anything with a Nigerian I would just assume that I
would be the loser. A USAA insurance agent told me he had a friend
who was retired FBI and was consulting but full time was spent on
tracking Nigerian aliases in the U.S.. He said many of them would take
a course in Nigeria targeting credit card scamming here; they would
set up residence, get a driver's license, etc.. Then they would acquire
15 credit cards, withdraw $15,000 each and be on a plane back to Lagos
that same night.
No doubt, as in any society, there are both good and bad actors.